The prices of Shen Man, Ma Yue, Jin Dian Atomic Energy and Baode An are slightly higher.
According to the structure, the lock core of anti-theft door is divided into grade A, grade B and grade B:
Class A: The key is flat, with only one side and single row of bullet slots. The cross key is basically Class A, which can be opened in about two or three minutes.
Class B: From the key point of view, it is a double-sided double-row bullet slot. Even with tools, skilled workers need some time;
Super B: It is the safest level at present. From the key, there is a double-sided double-row bullet slot with a blade or curve next to it. The technical standard of lock core design is more than 270 minutes.
Generally, the super B lock core is replaced, that is, the key has a serpentine groove, which requires a 200 yuan.
I bought it online, which is 70-80 yuan. Master lock repairer earns once 100.
If you can, you'd better change it yourself, which is both economical and safe. Meribao lock core is very good, 70 yuan.
First, the sequence of removing the lock cylinder:
1. Remove the inner and outer handle panels: the screws are on the handle panels of the house, one above and one below.
2. Remove the inner and outer lock cylinder covers: the screws are on the lock cylinder covers in the house, that is, the left and right sides of the key.
3. Remove the lock cylinder positioning screw: the screw is on the side of the door, in the middle of the lock tongue, and is the same height as the lock cylinder. The thickest is.
4. At this time, the old lock cylinder can be removed: the old lock cylinder can be replaced just like the new lock cylinder.
Secondly, install a new lock cylinder:
The sequence is opposite to disassembly, and several points should be noted:
1. Before installing a new lock cylinder, add a small amount of lock cylinder lubricant. Turn the key several times.
2. Lock core positioning screw must be tightened to prevent the screw from loosening, and then open the door.
3. Don't screw the lock cylinder cover too tightly, so as not to be too exciting and difficult to unlock.
4. When installing the inner handle panel, there is a safety pin below, which should be inserted into the corresponding safety pin hole.